Max does not 'update' 2024, at least not for me. It just installs the new version and both are separate. To go back, you just launch Max 2024 like normal.
Do you have a Wacom tablet? If so, try this:
https://forums.autodesk.com/t5/3ds-max-forum/3ds-max-will-not-launch/m-p/11704557#M205454
Does the error message give any other info to help know what caused the error?
To change the graphic mode before start, try this:
https://www.autodesk.com/support/technical/article/caas/sfdcarticles/sfdcarticles/Change-the-display...
Rob Holmes

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3ds Max (2023-2025), V-Ray 6.2, Ryzen 9 3950-X Processor, DDR 4 128MB, Gigabyte Aorus X570 Master motherboard, Sabrent Rocket NVMe 4.0 M.2 drives, NVidia RTX 4090, Space Pilot Pro, Windows 11 Pro x64, Tri-Monitor, Cintiq 13HD, Windows 11 x64
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